title: Beyond the lymphocyte predominant cell: CD4+CD8+ T-cells in nodular lymphocyte predominant Hodgkin lymphoma.
abstract: Hodgkin lymphomas are characterised by the presence of rare malignant cells in a background of non-neoplastic inflammatory cells. Flow cytometric analysis of involved tissues is generally not thought to be useful in establishing the diagnosis, because of the small number of neoplastic cells present. However, two recent studies describing a CD4+CD8+ (double-positive) T-cell population in nodular lymphocyte predominant Hodgkin lymphoma (NLPHL) suggest that flow cytometry could play a role in the diagnosis of this Hodgkin lymphoma subtype. In addition, awareness of this unusual T-cell population is important in avoiding a misdiagnosis of a T-cell neoplasm. Although the function of CD4+CD8+ T-cells in NLPHL is not known, studies of phenotypically similar cells in other settings point to a reactive or regulatory role. CD4+CD8+ T-cells have also been identified in the benign entity progressive transformation of germinal centres (PTGC), suggesting a possible relationship between NLPHL and PTGC.
authors.affiliation: James Homer Wright Pathology Laboratories, Department of Pathology, Massachusetts General Hospital and Harvard Medical School, Boston, Massachusetts 02114, USA. arahemtullah@partners.org
authors.forename: Aliyah
authors.initials: A
authors.lastname: Rahemtullah
authors.forename: Nancy Lee
authors.initials: NL
authors.lastname: Harris
authors.forename: Michelle E
authors.initials: ME
authors.lastname: Dorn
authors.forename: Frederic I
authors.initials: FI
authors.lastname: Preffer
authors.forename: Robert P
authors.initials: RP
authors.lastname: Hasserjian
mesh_terms: D015704:CD4 Antigens; D016827:CD8 Antigens; D005434:Flow Cytometry / Q000379:methods; D006689:Hodgkin Disease / Q000175:diagnosis / Q000473:pathology*; D006801:Humans; D008198:Lymph Nodes / Q000473:pathology; D013601:T-Lymphocytes / Q000473:pathology*
chemical_list: D015704:CD4 Antigens; D016827:CD8 Antigens